3M™ Ultra Hard Metric (UHM) Backplane
Socket Connector
Industry’s First Fully-Shielded Ultra High Performance
Lowest Crosstalk 2 mm Hard Metric Connector
The 3M Ultra Hard Metric (UHM) Socket Connector is the industry’s first fully-shielded
2 mm hard metric (HM) connector designed for more than 7 Gbps backplane performance
with a high signal density when used with unshielded industry standard 2 mm HM backplane
headers. The UHM socket is designed to be intermateable to 2 mm HM IEC 61076-4-101
3M™ Ultra Hard Metric (UHM) Backplane
Socket Connector
headers and is fully compatible with 2 mm HM PCB footprints.
The UHM socket connector’s unique design enables backplane designs using widely available
standard 2 mm HM connectors to support greater than 7 Gbps performance, high signal
integrity applications. Examples of backplane designs using 2 mm HM connectors are PICMG
CompactPCI® 3U and 6U and VITA VME 64x. Using the UHM socket connector, standard
CompactPCI and VME 64x systems can, for the first time, support high density of multi-gigabit
high speed serial IO protocols such as SAS, SATA, Rapid IO, PCI Express and Gigabit Ethernet.
The UHM socket connector uses unique patented “virtual coaxial box” shielding technology
Row Differential Shielding
to provide a tightly controlled impedance fully-shielded differential pair (100 ohm) or single-
ended (50 ohm), low crosstalk transmission path through the connector. Full shielding forms a
virtual coaxial box around signal contacts individually and/or in pairs. This dramatically reduces
crosstalk as compared to a standard unshielded 2 mm HM socket.
The UHM socket connector is available in 5-row (A, B, CL, CR, AB) and 8-row (D, E, DE,
FL, FR) form factors allowing a very high signal density – 101 signals per linear inch for the
8-row and 63 signals per linear inch for the 5-row. The unique construction of the UHM socket
connector supports 100 ohm differential pairs in rows or columns. Running differential pairs in
rows eliminates row-to-row skew.
Features & Benefits
• High-speed socket connector - more
than 7 Gbps even when used with
standard unshielded HM headers
• Full shielding of signals or signal
pairs minimizes crosstalk and
insertion loss
• 2 mm pitch offers intermateability
and PCB footprint compatibility with
standard HM designs – leverages
existing investment
Column Differential Shielding
Target Markets & Applications
• High signal density - 101 signals
per linear inch for the 8-row and 63
signals per linear inch for the 5-row –
optimizes PCB space
Embedded Systems
Industrial and Factory Automation
• Compact PCI 3U and 6U
Computing Systems,
VME Systems
• Process Control
• Transportation Systems
• Unique dual beam contact design for
high reliability
Communications
Test & Measurement –
e.g., PXI systems
• Access equipment, e.g., Channel
Banks, Wireless
Medical
Military
• Embedded computing platforms
Product Specifications
Specifications
Materials
Mechanical Performance
Product
Available upon request
Signal Integrity
Available upon request
Contacts
Copper alloy
Platings
Performance based plating at separable interface (Telecordia rated plating available)
Tin or tin-lead over nickel on press-fit tails
Housings
High temperature thermoplastic (LCP); UL 94-VO
Mating Force
0.32N nominal per signal contact
Unmating Force
0.20N nominal per signal contact
Normal Force
0.57N nominal per signal contact
Environmental
Temperature Rating
-55°C to 125°C
Electrical Performance
Current Rating (Fully Loaded)
1 A at 70° C Signal
Insulation Resistance
104 MΩ at 100 VDC
Withstanding Voltage
750 VRMS
Approvals and Certifications
UL and CSA pending
Technical Data Sheets
Insertion Loss
TS-2284
2 mm, B Type: 55, 95, 110 and 125 Signal Contacts, 5+2 Rows, Right Angle
TS-2301
2 mm, A Type: 110 Signal Contacts, 5+2 Rows, Right Angle
(3M™ Ultra Hard Metric Right Angle Socket Mated to an Unshielded Vertical 2 mm HM Header)
Insertion Loss for Row C
0
SDD21 (dB)
-1
-2
-3
-4
-5
-6
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
7 Gbps Eye Pattern 18.6 ps peak jitter
Frequency (GHz)
UHM-SX X X X X-5AP1-TG30
Number of Contacts
055, 095, 110, 125, 088, 176, 200
Style of Module
A, B, AB, CL, CR, D, E, DE, FL, FR
High Speed Option:
0= 50Ω Co-axial single-ended and 100Ω differential pair applications for connection to 5 +2-row headers
outer row ground tails in odd positions of row headers outer row ground tails in odd positions of row F/Z
3 = 50Ω Co-axial single-ended and 100Ω differential pair applications for connection to 5 +2-row headers
outer row ground tails in all positions of row F/Z
Note: Initial release will be only for 5 Row connectors
3M is a trademark of 3M Company.
CompactPCI is a trademark of PICMG-PCI Industrial Computer Manufacturers Group, Inc.
Important Notice
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guaranteed. Before using this product, you must evaluate it and determine if it is suitable for your intended application. You assume all risks and liability associated with such
use. Any statements related to the product which are not contained in 3M’s current publications, or any contrary statements contained on your purchase order shall have no
force or effect unless expressly agreed upon, in writing, by an authorized officer of 3M.
Warranty; Limited Remedy; Limited Liability.
This product will be free from defects in material and manufacture for a period of one year from the time of purchase. 3M MAKES NO OTHER WARRANTIES INCLUDING, BUT NOT
LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. If this product is defective within the warranty period stated above,
your exclusive remedy shall be, at 3M’s option, to replace or repair the 3M product or refund the purchase price of the 3M product. Except where prohibited by law, 3M will not be
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3
Electronic Solutions Division
Interconnect Products
6801 River Place Blvd.
Austin, TX 78726-9000
1-800-225-5373
www.3m.com/interconnects
Please recycle. Printed in USA.
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